I've played two of them, one long and one short scale, both had huge necks. Making user-friendly basses wasn't a priority for Gretsch.
For the last couple of months I've been playing upright 99% of the time, still the Gretsch neck feels huge. The fretboard is also flat, like a classical guitar.
But it's a conversation piece and it does have a great sound with Roto Trubass black tapewounds.
I bought it without any case and had to have a padded gig bag custom made for it. It's the largest you've seen. I'd like to find a hardshell case if one was ever designed for these basses. I've only seen them on eBay with gig bags.